Indicate by check mark whether the registrant files or will file annual reports under cover of
Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by
Regulation S-T Rule 101(b)(1): ☐

Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by
Regulation S-T Rule 101(b)(7): ☐

Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private
issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrants home country), or under the rules of the home country exchange on
which the registrants securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrants security holders, and, if discussing a material event, has
already been the subject of a Form 6-K submission or other Commission filing on EDGAR.

Other Events

On March 27, 2019, AerCap Holdings N.V. (AerCap) issued a press release announcing that AerCap Ireland Capital Designated Activity Company and
AerCap Global Aviation Trust (together, the Issuers), each a wholly-owned subsidiary of AerCap, priced their offering of senior notes, consisting of $500 million aggregate principal amount of the Issuers 4.875% Senior Notes due
2024 (the 2024 Notes) and $500 million aggregate principal amount of the Issuers 4.450% Senior Notes due 2026 (the 2026 Notes and, together with the 2024 Notes, the Notes). The 2024 Notes are an issuance of
further notes under the indenture pursuant to which the Issuers previously issued $400 million aggregate principal amount of 4.875% Senior Notes due 2024. The Issuers intend to use the net proceeds from the Notes for general corporate purposes.

The information contained in this Form 6-K is incorporated by reference into the Companys Form F-3 Registration Statement File No. 333-224192 and Form S-8 Registration Statements File Nos.
333-180323,333-154416,333-165839,333-194637 and
333-194638, and related Prospectuses, as such Registration Statements and Prospectuses may be amended from time to time.

Exhibits

99.1

AerCap Holdings N.V. Press Release.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by
the undersigned, thereunto duly authorized.